--- title: 'What You Need To Know About PCOS (PMOS) During Pregnancy' slug: pcos-pregnancy-what-to-expect lifeStage: pregnancy category: Cycle author: 'Samaira Farid' medicalReviewer: 'Dr Shree Datta, Consultant Obstetrician and Gynaecologist ' reviewerId: 'https://blog.bloume.com/pregnancy/medical-board.md#dr-shree-datta' lastUpdated: '2026-08-29' primarySource: 'Taking a Pregnancy Test When You Have PMOS: What to Know' wordCount: 1124 readTimeInSeconds: 281 --- # What You Need To Know About PCOS (PMOS) During Pregnancy If you have Polycystic Ovary Syndrome (PCOS), pregnancy brings its own set of things to keep in mind on top of the usual antenatal journey. The insulin resistance you live with means your risk of gestational diabetes runs higher than average, so monitoring becomes an important part of your care. This article covers what shifts when you become pregnant with PCOS, what to watch for, and how to work with your GP and midwife along the way. **Q: Will I definitely get gestational diabetes if I have PCOS (PMOS)?** A: Having PMOS raises your risk of gestational diabetes, but it does not mean you will develop it. Many pregnancies with PMOS never lead to a diagnosis. What it does mean is that you should be offered earlier screening with an oral glucose tolerance test, so if gestational diabetes does develop, it is picked up quickly and managed well. In the first trimester, you may notice your body feels different in ways that go beyond the usual tiredness and nausea. The insulin resistance you already live with does not pause when you conceive, and pregnancy with PCOS works a little differently because of it. You may also have come across Polyendocrine Metabolic Ovarian Syndrome (PMOS), a proposed new name for the condition. Understanding what is happening with your metabolism, and what your antenatal care should include, can help you approach the months ahead with a clearer picture of PMOS pregnancy and what to expect. ## How insulin resistance shifts during the first trimester Pregnancy raises insulin resistance for everyone, usually from around the first trimester onwards. When you already have PCOS / PMOS, your starting point is higher before pregnancy adds its own layer, so the two build on each other. This is a known physiological pattern, and one your care team should be aware of from early on. If your cycle is irregular due to PCOS / PMOS, your due date may rely on a first-trimester ultrasound rather than the date of your last period. The steady hormonal environment of pregnancy feels different from the shifting cycle you are used to managing, and some PMOS symptoms may feel altered during this time. The metabolic side, particularly around insulin, does not settle and can intensify. Telling your GP and midwife that you have PMOS at your earliest antenatal contact gives them what they need to put the right monitoring in place. ## Gestational diabetes risk and the screening you can expect PCOS (PMOS) raises your risk of gestational diabetes. Because of this, you are likely to be offered an oral glucose tolerance test (OGTT), a blood test that checks how your body handles sugar, earlier than the usual 24 to 28 week window. Your midwife will guide you on timing based on your own situation. Gestational diabetes develops when insulin production does not keep pace with the extra demands of pregnancy. With PMOS, your insulin sensitivity is already stretched, so that point can be reached more easily. A higher risk does not make gestational diabetes certain, and many pregnancies with PMOS never lead to a diagnosis. It does mean screening matters, and that your care team will want to keep a close eye on your blood glucose through the pregnancy. > **INFO**: If you have PCOS (PMOS), mention it at your booking appointment. That lets your midwife flag you for earlier gestational diabetes screening. ## Monitoring throughout pregnancy with PCOS (PMOS) Beyond gestational diabetes, your care team may watch your blood pressure more closely, since raised blood pressure is another thing linked with PMOS in pregnancy. Routine antenatal appointments already include blood pressure checks, and letting your midwife and GP know your PMOS history means they can read any results in the right context and refer you on if needed. If you saw a specialist or GP for PMOS before you became pregnant, it is worth getting in touch early to talk through whether your existing plan needs reviewing. Your GP can also refer you to an obstetric team with experience of PMOS if your pregnancy is assessed as higher risk. ## What changes and what stays the same The hormonal environment of pregnancy is quite different from your usual cycle, so some of the symptoms you associate with PMOS may feel different or less prominent for a while. Pregnancy does not clear or cure PMOS. The condition carries on underneath, and its metabolic effects, particularly insulin resistance, stay relevant and can be heightened by the demands of pregnancy. After you give birth, PMOS and the metabolic side of it come back into focus. It is worth talking through postnatal follow-up with your GP before the birth, so you have a clear plan for picking up any management that was paused or adjusted during pregnancy. ## Working with your GP and midwife Pre-conception counselling, available through your GP, gives you a chance to get your health in a good place before becoming pregnant. If you are already pregnant, an early appointment to talk through your PCOS (PMOS) history does much the same thing. Your GP can review any medication, check your metabolic health, and help coordinate your antenatal care so the right screening and monitoring are in place from the start. Staying in clear contact with your care team through the pregnancy is one of the most useful things you can do. Bring your PCOS history to every relevant appointment. Ask directly whether earlier gestational diabetes screening has been arranged, and raise any new symptoms, particularly unusual thirst, blurred vision, or fatigue that will not lift, with your midwife promptly. > **WARNING**: This article gives general health information and does not replace advice from your GP, midwife, or obstetric team. If you are worried about any symptoms during pregnancy, call your midwife or GP. If you have not yet talked with your GP about what your PMOS means for your antenatal care, booking that appointment early in your pregnancy is a practical first step. ## Frequently asked questions **Q: Will I definitely get gestational diabetes if I have PCOS (PMOS)?** Having PMOS raises your risk of gestational diabetes, but it does not mean you will develop it. Many pregnancies with PMOS never lead to a diagnosis. What it does mean is that you should be offered earlier screening with an oral glucose tolerance test, so if gestational diabetes does develop, it is picked up quickly and managed well. **Q: Does pregnancy change my PCOS (PMOS) symptoms?** The hormonal environment of pregnancy is different from your usual cycle, so some PMOS symptoms may feel altered while you are pregnant. Pregnancy does not clear or cure PMOS, though. The metabolic side, including insulin resistance, carries on and can be intensified by the demands of pregnancy. Your PMOS will still be there after you give birth. **Q: What should I tell my midwife about my PCOS (PMOS) at the booking appointment?** Let your midwife know at the booking appointment that you have PMOS. That lets them flag you for earlier gestational diabetes screening, note the higher chance of raised blood pressure, and make sure your GP or a specialist is looped in if needed. If you have been seen by a specialist for PMOS before, mention that too, so your midwife can pull up the relevant background. **Q: Is pre-conception counselling something I need to pay for privately?** Pre-conception counselling for PCOS is available through your GP on the NHS. It gives you a chance to review your health, talk through any existing management plan, and get into a good position before conceiving. If you are already pregnant, an early GP appointment does much the same thing and lets your care be coordinated from the start. ### Clinical Sources - [Taking a Pregnancy Test When You Have PMOS: What to Know](https://www.healthline.com/health/pregnancy/pcos-and-pregnancy-test) - [NHS: Polycystic ovary syndrome (PCOS) – Treatment](https://www.nhs.uk/conditions/polycystic-ovary-syndrome-pcos/treatment/) - [NHS: Polycystic ovary syndrome (PCOS) – Treatment](https://www.nhs.uk/conditions/polycystic-ovary-syndrome-pcos/treatment/) - [Pathway Polycystic Ovary Syndrome](https://primarycare.northeastlondon.icb.nhs.uk/wp-content/uploads/2025/01/Pathway-Polycystic-Ovary-Syndrome-10_2024.pdf) - [Pathway Polycystic Ovary Syndrome](https://primarycare.northeastlondon.icb.nhs.uk/wp-content/uploads/2025/01/Pathway-Polycystic-Ovary-Syndrome-10_2024.pdf) - [Polycystic ovary syndrome (PCOS): what it means for your long-term health](https://www.rcog.org.uk/for-the-public/browse-our-patient-information/polycystic-ovary-syndrome-pcos-what-it-means-for-your-long-term-health/) --- Reviewed by Dr Shree Datta, Consultant Obstetrician and Gynaecologist | [Medical Board](https://blog.bloume.com/pregnancy/medical-board.md) | August 2026